i own a tC, sunroof has never rattled on me. its the head lining around the sun roof that rattled. that was fixed with a quick trip to the dealer. the 05 did have a recall on the sunroof wind deflector shattering so if you go for the tC make sure that it was taken in for that recall. both cars are about the same power. both 2.4L engines
Accord: 160hp 161tq 6800 rpm redline
tC: 160hp 163tq 6250 rpm redline.
for the trunk, its not the trunk itself, its the paneling around it. im about to strip that out anyways.
tC to me is a better choice. and has a larger aftermarket side to it. tC has more engine builds, more turbo kits, more electronic sides to it or turboing and timing, and the storker kit to go from 2.4L to 2.7L.
up to you, i think the tC has a sporty feel to it, but i have different tires, stock tires are pretty crappy none the less. so tires will affect the handling of the tC alot. your choice, tC seems easier to mod and the Accord coupe lacks stle to me. tC has style as well as a chance to enhance that style.